git.mutantstargoat.com Git - freeglut/blob - src/x11/fg_gamemode_x11.c

   1 /*
   2  * fg_gamemode_x11.c
   3  *
   4  * The game mode handling code.
   5  *
   6  * Copyright (c) 1999-2000 Pawel W. Olszta. All Rights Reserved.
   7  * Written by Pawel W. Olszta, <olszta@sourceforge.net>
   8  * Copied for Platform code by Evan Felix <karcaw at gmail.com>
   9  * Creation date: Thur Feb 2 2012
  10  *
  11  * Permission is hereby granted, free of charge, to any person obtaining a
  12  * copy of this software and associated documentation files (the "Software"),
  13  * to deal in the Software without restriction, including without limitation
  14  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  15  * and/or sell copies of the Software, and to permit persons to whom the
  16  * Software is furnished to do so, subject to the following conditions:
  17  *
  18  * The above copyright notice and this permission notice shall be included
  19  * in all copies or substantial portions of the Software.
  20  *
  21  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  22  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  23  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  24  * PAWEL W. OLSZTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
  25  * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  26  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27  */
  28
  29 #include <GL/freeglut.h>
  30 #include "../fg_internal.h"
  31
  32 /* we'll try to use XR&R if it's available at compile-time, and at runtime, and the user
  33  * hasn't explicitly disabled it by setting the FREEGLUT_NO_XRANDR env-var.
  34  */
  35 static int use_xrandr(void)
  36 {
  37 #ifdef HAVE_X11_EXTENSIONS_XRANDR_H
  38     int event_base, error_base;
  39         if(!XRRQueryExtension(fgDisplay.pDisplay.Display, &event_base, &error_base)) {
  40                 return 0;
  41         }
  42         if(getenv("FREEGLUT_NO_XRANDR")) {
  43                 return 0;
  44         }
  45         return 1;
  46 #else
  47         return 0;       /* no compile-time support */
  48 #endif
  49 }
  50
  51 /* we'll try to use XF86VidMode if it's available at compile-time, and at runtime, and the
  52  * user hasn't explicitly disabled it by setting the FREEGLUT_NO_XF86VM env-var.
  53  */
  54 static int use_xf86vm(void)
  55 {
  56 #ifdef HAVE_X11_EXTENSIONS_XF86VMODE_H
  57         int event_base, error_base;
  58         if(!XF86VidModeQueryExtension(fgDisplay.pDisplay.Display, &event_base, &error_base)) {
  59                 return 0;
  60         }
  61         if(getenv("FREEGLUT_NO_XF86VM")) {
  62                 return 0;
  63         }
  64         return 1;
  65 #else
  66         return 0;       /* no compile-time support */
  67 #endif
  68 }
  69
  70
  71 #ifdef HAVE_X11_EXTENSIONS_XRANDR_H
  72 static int xrandr_resize(int xsz, int ysz, int rate, int just_checking)
  73 {
  74     int ver_major, ver_minor, use_rate;
  75     XRRScreenConfiguration *xrr_config = 0;
  76     Status result = -1;
  77
  78         /* NOTE: we have already determined that XR&R is availble and enabled before calling this */
  79
  80     XRRQueryVersion(fgDisplay.pDisplay.Display, &ver_major, &ver_minor);
  81
  82     /* we only heed the rate if we CAN actually use it (Xrandr >= 1.1) and
  83      * the user actually cares about it (rate > 0)
  84      */
  85     use_rate = ( rate > 0 ) && ( ( ver_major > 1 ) ||
  86                                          ( ( ver_major == 1 ) && ( ver_minor >= 1 ) ) );
  87
  88     /* this loop is only so that the whole thing will be repeated if someone
  89      * else changes video mode between our query of the current information and
  90      * the attempt to change it.
  91      */
  92     do {
  93         XRRScreenSize *ssizes;
  94         short *rates;
  95         Rotation rot;
  96         int i, ssizes_count, rates_count, curr, res_idx = -1;
  97         Time timestamp, cfg_timestamp;
  98
  99         if(xrr_config) {
 100             XRRFreeScreenConfigInfo(xrr_config);
 101         }
 102
 103         if(!(xrr_config = XRRGetScreenInfo(fgDisplay.pDisplay.Display, fgDisplay.pDisplay.RootWindow))) {
 104             fgWarning("XRRGetScreenInfo failed");
 105             break;
 106         }
 107         ssizes = XRRConfigSizes(xrr_config, &ssizes_count);
 108         curr = XRRConfigCurrentConfiguration(xrr_config, &rot);
 109         timestamp = XRRConfigTimes(xrr_config, &cfg_timestamp);
 110
 111         /* if either of xsz or ysz are unspecified, use the current values */
 112         if(xsz <= 0)
 113             xsz = fgState.GameModeSize.X = ssizes[curr].width;
 114         if(ysz <= 0)
 115             ysz = fgState.GameModeSize.Y = ssizes[curr].height;
 116
 117
 118         if(xsz == ssizes[curr].width && ysz == ssizes[curr].height) {
 119             /* no need to switch, we're already in the requested resolution */
 120             res_idx = curr;
 121         } else {
 122             for(i=0; i<ssizes_count; i++) {
 123                 if(ssizes[i].width == xsz && ssizes[i].height == ysz) {
 124                     res_idx = i;
 125                     break;  /* found it */
 126                 }
 127             }
 128         }
 129         if(res_idx == -1)
 130             break;  /* no matching resolution */
 131
 132 #if ( RANDR_MAJOR > 1 ) || ( ( RANDR_MAJOR == 1 ) && ( RANDR_MINOR >= 1 ) )
 133         if(use_rate) {
 134             rate = fgState.GameModeRefresh;
 135
 136             /* for the selected resolution, let's find out if there is
 137              * a matching refresh rate available.
 138              */
 139             rates = XRRConfigRates(xrr_config, res_idx, &rates_count);
 140
 141             for(i=0; i<rates_count; i++) {
 142                 if(rates[i] == rate) {
 143                     break;
 144                 }
 145             }
 146             if(i == rates_count) {
 147                 break; /* no matching rate */
 148             }
 149         }
 150 #endif
 151
 152         if(just_checking) {
 153             result = 0;
 154             break;
 155         }
 156
 157 #if ( RANDR_MAJOR > 1 ) || ( ( RANDR_MAJOR == 1 ) && ( RANDR_MINOR >= 1 ) )
 158         if(use_rate)
 159             result = XRRSetScreenConfigAndRate(fgDisplay.pDisplay.Display, xrr_config,
 160                     fgDisplay.pDisplay.RootWindow, res_idx, rot, rate, timestamp);
 161         else
 162 #endif
 163             result = XRRSetScreenConfig(fgDisplay.pDisplay.Display, xrr_config,
 164                     fgDisplay.pDisplay.RootWindow, res_idx, rot, timestamp);
 165
 166     } while(result == RRSetConfigInvalidTime);
 167
 168     if(xrr_config) {
 169         XRRFreeScreenConfigInfo(xrr_config);
 170     }
 171
 172     if(result == 0) {
 173         return 0;
 174     }
 175
 176     return -1;
 177 }
 178 #endif  /* HAVE_X11_EXTENSIONS_XRANDR_H */
 179
 180 /*
 181  * Remembers the current visual settings, so that
 182  * we can change them and restore later...
 183  */
 184 void fgPlatformRememberState( void )
 185 {
 186     /*
 187      * Remember the current pointer location before going fullscreen
 188      * for restoring it later:
 189      */
 190     Window junk_window;
 191     unsigned int junk_mask;
 192
 193     XQueryPointer(fgDisplay.pDisplay.Display, fgDisplay.pDisplay.RootWindow,
 194             &junk_window, &junk_window,
 195             &fgDisplay.pDisplay.DisplayPointerX, &fgDisplay.pDisplay.DisplayPointerY,
 196             &fgDisplay.pDisplay.DisplayPointerX, &fgDisplay.pDisplay.DisplayPointerY, &junk_mask);
 197
 198 #   ifdef HAVE_X11_EXTENSIONS_XRANDR_H
 199     if(use_xrandr()) {
 200         XRRScreenConfiguration *xrr_config;
 201         XRRScreenSize *ssizes;
 202         Rotation rot;
 203         int ssize_count, curr;
 204
 205         if((xrr_config = XRRGetScreenInfo(fgDisplay.pDisplay.Display, fgDisplay.pDisplay.RootWindow))) {
 206             ssizes = XRRConfigSizes(xrr_config, &ssize_count);
 207             curr = XRRConfigCurrentConfiguration(xrr_config, &rot);
 208
 209             fgDisplay.pDisplay.prev_xsz = ssizes[curr].width;
 210             fgDisplay.pDisplay.prev_ysz = ssizes[curr].height;
 211             fgDisplay.pDisplay.prev_refresh = -1;
 212
 213 #       if ( RANDR_MAJOR > 1 ) || ( ( RANDR_MAJOR == 1 ) && ( RANDR_MINOR >= 1 ) )
 214             if(fgState.GameModeRefresh != -1) {
 215                 fgDisplay.pDisplay.prev_refresh = XRRConfigCurrentRate(xrr_config);
 216             }
 217 #       endif
 218
 219             fgDisplay.pDisplay.prev_size_valid = 1;
 220
 221             XRRFreeScreenConfigInfo(xrr_config);
 222         }
 223     }
 224 #   endif       /* HAVE_X11_EXTENSIONS_XRANDR_H */
 225
 226     /*
 227      * This highly depends on the XFree86 extensions,
 228      * not approved as X Consortium standards
 229      */
 230 #   ifdef HAVE_X11_EXTENSIONS_XF86VMODE_H
 231         if(use_xf86vm()) {
 232                 /*
 233                  * Remember the current ViewPort location of the screen to be able to
 234                  * restore the ViewPort on LeaveGameMode():
 235                  */
 236                 if( !XF86VidModeGetViewPort(
 237                                  fgDisplay.pDisplay.Display,
 238                                  fgDisplay.pDisplay.Screen,
 239                                  &fgDisplay.pDisplay.DisplayViewPortX,
 240                                  &fgDisplay.pDisplay.DisplayViewPortY ) )
 241                         fgWarning( "XF86VidModeGetViewPort failed" );
 242
 243
 244                 /* Query the current display settings: */
 245                 fgDisplay.pDisplay.DisplayModeValid =
 246                   XF86VidModeGetModeLine(
 247                         fgDisplay.pDisplay.Display,
 248                         fgDisplay.pDisplay.Screen,
 249                         &fgDisplay.pDisplay.DisplayModeClock,
 250                         &fgDisplay.pDisplay.DisplayMode
 251                 );
 252
 253                 if( !fgDisplay.pDisplay.DisplayModeValid )
 254                         fgWarning( "XF86VidModeGetModeLine failed" );
 255         }
 256 #   endif
 257
 258 }
 259
 260 /*
 261  * Restores the previously remembered visual settings
 262  */
 263 void fgPlatformRestoreState( void )
 264 {
 265     /* Restore the remembered pointer position: */
 266     XWarpPointer(
 267         fgDisplay.pDisplay.Display, None, fgDisplay.pDisplay.RootWindow, 0, 0, 0, 0,
 268         fgDisplay.pDisplay.DisplayPointerX, fgDisplay.pDisplay.DisplayPointerY
 269     );
 270
 271 #ifdef HAVE_X11_EXTENSIONS_XRANDR_H
 272         if(use_xrandr()) {
 273             if(fgDisplay.pDisplay.prev_size_valid) {
 274                     if(xrandr_resize(fgDisplay.pDisplay.prev_xsz, fgDisplay.pDisplay.prev_ysz, fgDisplay.pDisplay.prev_refresh, 0) != -1) {
 275                             fgDisplay.pDisplay.prev_size_valid = 0;
 276 #ifdef HAVE_X11_EXTENSIONS_XF86VMODE_H
 277                         fgDisplay.pDisplay.DisplayModeValid = 0;
 278 #endif
 279                 }
 280                 }
 281                 return; /* don't fall back to XF86VidMode if we have XR&R */
 282     }
 283 #endif  /* HAVE_X11_EXTENSIONS_XRANDR_H */
 284
 285
 286
 287 #ifdef HAVE_X11_EXTENSIONS_XF86VMODE_H
 288     /*
 289      * This highly depends on the XFree86 extensions,
 290      * not approved as X Consortium standards
 291      */
 292         if(use_xf86vm()) {
 293
 294                 if( fgDisplay.pDisplay.DisplayModeValid )
 295                 {
 296                         XF86VidModeModeInfo** displayModes;
 297                         int i, displayModesCount;
 298
 299                         if( !XF86VidModeGetAllModeLines(
 300                                          fgDisplay.pDisplay.Display,
 301                                          fgDisplay.pDisplay.Screen,
 302                                          &displayModesCount,
 303                                          &displayModes ) )
 304                         {
 305                                 fgWarning( "XF86VidModeGetAllModeLines failed" );
 306                                 return;
 307                         }
 308
 309
 310                         /*
 311                          * Check every of the modes looking for one that matches our demands.
 312                          * If we find one, switch to it and restore the remembered viewport.
 313                          */
 314                         for( i = 0; i < displayModesCount; i++ )
 315                         {
 316                                 if(displayModes[ i ]->hdisplay == fgDisplay.pDisplay.DisplayMode.hdisplay &&
 317                                    displayModes[ i ]->vdisplay == fgDisplay.pDisplay.DisplayMode.vdisplay &&
 318                                    displayModes[ i ]->dotclock == fgDisplay.pDisplay.DisplayModeClock )
 319                                 {
 320                                         if( !XF86VidModeSwitchToMode(
 321                                                          fgDisplay.pDisplay.Display,
 322                                                          fgDisplay.pDisplay.Screen,
 323                                                          displayModes[ i ] ) )
 324                                         {
 325                                                 fgWarning( "XF86VidModeSwitchToMode failed" );
 326                                                 break;
 327                                         }
 328
 329                                         if( !XF86VidModeSetViewPort(
 330                                                          fgDisplay.pDisplay.Display,
 331                                                          fgDisplay.pDisplay.Screen,
 332                                                          fgDisplay.pDisplay.DisplayViewPortX,
 333                                                          fgDisplay.pDisplay.DisplayViewPortY ) )
 334                                                 fgWarning( "XF86VidModeSetViewPort failed" );
 335
 336
 337                                         /*
 338                                          * For the case this would be the last X11 call the application
 339                                          * calls exit() we've to flush the X11 output queue to have the
 340                                          * commands sent to the X server before the application exits.
 341                                          */
 342                                         XFlush( fgDisplay.pDisplay.Display );
 343
 344                                         fgDisplay.pDisplay.DisplayModeValid = 0;
 345 #ifdef HAVE_X11_EXTENSIONS_XRANDR_H
 346                                         fgDisplay.pDisplay.prev_size_valid = 0;
 347 #endif
 348                                         break;
 349                                 }
 350                         }
 351                         XFree( displayModes );
 352                 }
 353     }
 354 #endif  /* HAVE_X11_EXTENSIONS_XF86VMODE_H */
 355 }
 356
 357 #ifdef HAVE_X11_EXTENSIONS_XF86VMODE_H
 358
 359 /*
 360  * Checks a single display mode settings against user's preferences.
 361  */
 362 static GLboolean fghCheckDisplayMode( int width, int height, int depth, int refresh )
 363 {
 364     /* The desired values should be stored in fgState structure... */
 365     return ( width == fgState.GameModeSize.X ) &&
 366            ( height == fgState.GameModeSize.Y ) &&
 367            ( depth == fgState.GameModeDepth ) &&
 368            ( refresh == fgState.GameModeRefresh );
 369 }
 370
 371 /*
 372  * Checks all display modes settings against user's preferences.
 373  * Returns the mode number found or -1 if none could be found.
 374  */
 375 static int fghCheckDisplayModes( GLboolean exactMatch, int displayModesCount, XF86VidModeModeInfo** displayModes )
 376 {
 377     int i;
 378     for( i = 0; i < displayModesCount; i++ )
 379     {
 380         /* Compute the displays refresh rate, dotclock comes in kHz. */
 381         int refresh = ( displayModes[ i ]->dotclock * 1000 ) /
 382                       ( displayModes[ i ]->htotal * displayModes[ i ]->vtotal );
 383
 384         if( fghCheckDisplayMode( displayModes[ i ]->hdisplay,
 385                                  displayModes[ i ]->vdisplay,
 386                                  fgState.GameModeDepth,
 387                                  ( exactMatch ? refresh : fgState.GameModeRefresh ) ) ) {
 388             if (!exactMatch)
 389             {
 390                 /* Update the chosen refresh rate, otherwise a
 391                  * glutGameModeGet(GLUT_GAME_MODE_REFRESH_RATE) would not
 392                  * return the right values
 393                  */
 394                 fgState.GameModeRefresh = refresh;
 395             }
 396
 397             return i;
 398         }
 399     }
 400     return -1;
 401 }
 402
 403 #endif
 404
 405 /*
 406  * Changes the current display mode to match user's settings
 407  */
 408 GLboolean fgPlatformChangeDisplayMode( GLboolean haveToTest )
 409 {
 410     GLboolean success = GL_FALSE;
 411 #ifdef HAVE_X11_EXTENSIONS_XRANDR_H
 412         if(use_xrandr()) {
 413             if(xrandr_resize(fgState.GameModeSize.X, fgState.GameModeSize.Y,
 414                             fgState.GameModeRefresh, haveToTest) != -1) {
 415                         return GL_TRUE;
 416             }
 417                 return GL_FALSE;        /* don't fall back to XF86VidMode */
 418         }
 419 #endif  /* HAVE_X11_EXTENSIONS_XRANDR_H */
 420
 421
 422     /*
 423      * This highly depends on the XFree86 extensions,
 424      * not approved as X Consortium standards
 425      */
 426 #ifdef HAVE_X11_EXTENSIONS_XF86VMODE_H
 427         if(use_xf86vm()) {
 428                 /*
 429                  * This is also used by applications which check modes by calling
 430                  * glutGameModeGet(GLUT_GAME_MODE_POSSIBLE), so allow the check:
 431                  */
 432                 if( haveToTest || fgDisplay.pDisplay.DisplayModeValid )
 433                 {
 434                         XF86VidModeModeInfo** displayModes;
 435                         int i, displayModesCount;
 436
 437                         /* If we don't have a valid modeline in the display structure, which
 438                          * can happen if this is called from glutGameModeGet instead of
 439                          * glutEnterGameMode, then we need to query the current mode, to make
 440                          * unspecified settings to default to their current values.
 441                          */
 442                         if(!fgDisplay.pDisplay.DisplayModeValid) {
 443                                 if(!XF86VidModeGetModeLine(fgDisplay.pDisplay.Display, fgDisplay.pDisplay.Screen,
 444                                                 &fgDisplay.pDisplay.DisplayModeClock, &fgDisplay.pDisplay.DisplayMode)) {
 445                                         return success;
 446                                 }
 447                         }
 448
 449                         if (fgState.GameModeSize.X == -1)
 450                         {
 451                                 fgState.GameModeSize.X = fgDisplay.pDisplay.DisplayMode.hdisplay;
 452                         }
 453                         if (fgState.GameModeSize.Y == -1)
 454                         {
 455                                 fgState.GameModeSize.Y = fgDisplay.pDisplay.DisplayMode.vdisplay;
 456                         }
 457                         if (fgState.GameModeDepth == -1)
 458                         {
 459                                 /* can't get color depth from this, nor can we change it, do nothing
 460                                  * TODO: get with XGetVisualInfo()? but then how to set?
 461                                  */
 462                         }
 463                         if (fgState.GameModeRefresh == -1)
 464                         {
 465                                 /* Compute the displays refresh rate, dotclock comes in kHz. */
 466                                 int refresh = ( fgDisplay.pDisplay.DisplayModeClock * 1000 ) /
 467                                         ( fgDisplay.pDisplay.DisplayMode.htotal * fgDisplay.pDisplay.DisplayMode.vtotal );
 468
 469                                 fgState.GameModeRefresh = refresh;
 470                         }
 471
 472                         /* query all possible display modes */
 473                         if( !XF86VidModeGetAllModeLines(
 474                                          fgDisplay.pDisplay.Display,
 475                                          fgDisplay.pDisplay.Screen,
 476                                          &displayModesCount,
 477                                          &displayModes ) )
 478                         {
 479                                 fgWarning( "XF86VidModeGetAllModeLines failed" );
 480                                 return success;
 481                         }
 482
 483
 484                         /*
 485                          * Check every of the modes looking for one that matches our demands,
 486                          * ignoring the refresh rate if no exact match could be found.
 487                          */
 488                         i = fghCheckDisplayModes( GL_TRUE, displayModesCount, displayModes );
 489                         if( i < 0 ) {
 490                                 i = fghCheckDisplayModes( GL_FALSE, displayModesCount, displayModes );
 491                         }
 492                         success = ( i < 0 ) ? GL_FALSE : GL_TRUE;
 493
 494                         if( !haveToTest && success ) {
 495                                 if( !XF86VidModeSwitchToMode(
 496                                                  fgDisplay.pDisplay.Display,
 497                                                  fgDisplay.pDisplay.Screen,
 498                                                  displayModes[ i ] ) )
 499                                         fgWarning( "XF86VidModeSwitchToMode failed" );
 500                         }
 501
 502                         XFree( displayModes );
 503                 }
 504         }
 505
 506 #endif  /* HAVE_X11_EXTENSIONS_XF86VMODE_H */
 507
 508     return success;
 509 }
 510
 511
 512 void fgPlatformEnterGameMode( void )
 513 {
 514
 515     /*
 516      * Sync needed to avoid a real race, the Xserver must have really created
 517      * the window before we can grab the pointer into it:
 518      */
 519     XSync( fgDisplay.pDisplay.Display, False );
 520     /*
 521      * Grab the pointer to confine it into the window after the calls to
 522      * XWrapPointer() which ensure that the pointer really enters the window.
 523      *
 524      * We also need to wait here until XGrabPointer() returns GrabSuccess,
 525      * otherwise the new window is not viewable yet and if the next function
 526      * (XSetInputFocus) is called with a not yet viewable window, it will exit
 527      * the application which we have to aviod, so wait until it's viewable:
 528      */
 529     while( GrabSuccess != XGrabPointer(
 530                fgDisplay.pDisplay.Display, fgStructure.GameModeWindow->Window.Handle,
 531                TRUE,
 532                ButtonPressMask | ButtonReleaseMask | ButtonMotionMask
 533                | PointerMotionMask,
 534                GrabModeAsync, GrabModeAsync,
 535                fgStructure.GameModeWindow->Window.Handle, None, CurrentTime) )
 536         usleep( 100 );
 537     /*
 538      * Change input focus to the new window. This will exit the application
 539      * if the new window is not viewable yet, see the XGrabPointer loop above.
 540      */
 541     XSetInputFocus(
 542         fgDisplay.pDisplay.Display,
 543         fgStructure.GameModeWindow->Window.Handle,
 544         RevertToNone,
 545         CurrentTime
 546     );
 547
 548     /* Move the Pointer to the middle of the fullscreen window */
 549     XWarpPointer(
 550         fgDisplay.pDisplay.Display,
 551         None,
 552         fgDisplay.pDisplay.RootWindow,
 553         0, 0, 0, 0,
 554         fgState.GameModeSize.X/2, fgState.GameModeSize.Y/2
 555     );
 556
 557 #ifdef HAVE_X11_EXTENSIONS_XF86VMODE_H
 558         if(use_xf86vm()) {
 559
 560                 if( fgDisplay.pDisplay.DisplayModeValid )
 561                 {
 562                         int x, y;
 563                         Window child;
 564
 565                         /* Change to viewport to the window topleft edge: */
 566                         if( !XF86VidModeSetViewPort( fgDisplay.pDisplay.Display, fgDisplay.pDisplay.Screen, 0, 0 ) )
 567                                 fgWarning( "XF86VidModeSetViewPort failed" );
 568
 569                         /*
 570                          * Final window repositioning: It could be avoided using an undecorated
 571                          * window using override_redirect, but this * would possily require
 572                          * more changes and investigation.
 573                          */
 574
 575                         /* Get the current postion of the drawable area on screen */
 576                         XTranslateCoordinates(
 577                                 fgDisplay.pDisplay.Display,
 578                                 fgStructure.CurrentWindow->Window.Handle,
 579                                 fgDisplay.pDisplay.RootWindow,
 580                                 0, 0, &x, &y,
 581                                 &child
 582                         );
 583
 584                         /* Move the decorataions out of the topleft corner of the display */
 585                         XMoveWindow( fgDisplay.pDisplay.Display, fgStructure.CurrentWindow->Window.Handle,
 586                                                  -x, -y);
 587                 }
 588         }
 589
 590 #endif  /* HAVE_X11_EXTENSIONS_XF86VMODE_H */
 591
 592     /* Grab the keyboard, too */
 593     XGrabKeyboard(
 594         fgDisplay.pDisplay.Display,
 595         fgStructure.GameModeWindow->Window.Handle,
 596         FALSE,
 597         GrabModeAsync, GrabModeAsync,
 598         CurrentTime
 599     );
 600
 601 }
 602
 603 void fgPlatformLeaveGameMode( void )
 604 {
 605     XUngrabPointer( fgDisplay.pDisplay.Display, CurrentTime );
 606     XUngrabKeyboard( fgDisplay.pDisplay.Display, CurrentTime );
 607 }
 608